Speed-varying mechanism



W. E. GRAY.

A SPEED VAHYING MECHANISM.

APPLICATION FILED IuLY I4. 192|.

1,434,814, l Patented Nov. 7, l1922.

2 SHEETS-SHEET l.

' William E. @my

W. E. GRAY.

SPEED VARYING MECHANISM.

l APPLlcArloN mep JULY 14,1921.

1,434,814. y I Patented Nov. 7 1922..

' 2 SHEETS-shim 2l 'WELLIAM E. GRAY, GIE CHICAGO, LLINOES,

.ASSG-NGR TO IVIORE ELECTRC COB'PORJL.-

TON, F CHIGAGG, LLINGIS.

Application filed July 14,

To @ZZ 'whom t may concern Be it known that l, lllinninar lil. GRAY, a citizen ot the United States, and a resident ot the city oit Chicago, county of Cookand State of `illinois, have invented certain new and usei'iul improvements in Speed-Varying h/echanisms, of Which the following is a `speciication.

My invention relates to improvements in speed varying` mechanisms especially adapted for use in driving4 hair clipper and similar n'iechanisms the object ot the invention bein` to provide a simple and etiicient mechanism ot' this character.

@ther objects Will appear hereinafter.

111e invention consists in the combinations and arrangements or parts hereinaiter described and claimed.

- The invention will be best understood' b i reference to the accompanying drawings forming a part ot this speciiicatioin and in which,

Fig. `1 isa side view ot' mechanism embodying` the invention,

Fi 2 is section of the saine taken substantially on line 2-2 oit Fig. 3,

3 is an enlarged section taken substantially on line 8`3 Fig. 1.

l". L is a section taken on line Fig. 5 is a section taken on line 5-5 ot Figi'. t, and

Fig'. 6 is a Fig'. V2.

The preferred :torni of construction illustrated in the drawings, comprises an electric motor 7 of any usual or desired construction `fed with current by flexible Wires 8 and provided with a suitable supporting bail as shown. The motor shaft 10 carries a t'riction disk 1-1 contacting; with a bevelled friction Wheel 12, said :friction wheel beingl preferably nia de et a plurality oit plates ot rawhide clainj ed and secured together as shown. The friction wheel 1Q splined or :feathered ou a countershait arranged across the tace ot the friction disk 11 at an angle thereto and in position to permit of Contact between the friction Wheei and the friction disk 11. @ne end oit' the shaft 18 is mounted in a bearing; 1a slidable in a slot 15 in a bracket or lug 16 .termed on a casing; 17 secured to the motor casing as shown. in adjusting screw 1S contacts with the outer side of the bearing block 141- and a comsection taken on line 6-6 ott i921. serial no. esmas.

pression spring 19 is arranged to contactwith the inner side ot said block whereby the corresponding end oi the sha-tt 13 may be adjusted toward and away from the triction disk 11 to adjust the friction Wheel 12 into nice contact with said disk. At its other end the shaft 13 is mounted in a bearing block 20 `Which is mounted to swing on pivot pins or trunnions 21 on an airis substantially parallei With the tace oitdisk 11 and whereby adjustments or shaft '13 are permitted. A ilexible shattcasing 23 is attached to the bearing block 2@ and the flexible shaft 24, enclosed in said casing, is attached to the corresponding end of shaft 13 and 'whereby said .Flexible shaft 2a will be driven by sha-it 13. The friction Wheel 12 is provided With a grooved hub 25 engaging a roller 26on a lever 26 fulcrumed at 2? on a bracket 28 secured to the ycasina 17 and whereby the friction Wheel 12 may be shiftv ed along the shat't 13. An adjusting screwY 29 is threaded in the casing` 17 and provided with a swivel connection with a post 30 on lever 2G oradjusting said friction Wheel. A suitable casing' or cap 31 is arranged over the.Workingu parts as shown and attached to the casing 17, suitable openings being' provided in said casing 31 for the` shaft casing 533 and the adjustingv screw 18 as shown.

By arrairgementj the friction Wheel 12 may be readilv adjusted to various posh tions in contact with the face ci' friction disk 11 and the 'force or the Contact between them nicely adjusted by means of the screw 18 so as to obtain varying speeds oit rotation of shaft 24. When the disk 11 is rotating, the outermost points thereoi' travel at `greater speeds than relatively inner points, and this is also true ont the points on the contacting face ot the bevelled friction Wheei Thus the bevelled contacting :tace ot the friction Wheel 12 tends to compensate for the diiierent speeds of travel ot different points on the friction disk 12, tending to prevent slippagebetvveen said Wheel and disk and prevent or lessen Wear between them. The speeiiic 'form and arrangement of parts is a simple and effective one for the purpose.

.The flexible shaft 24; driven by the mechanism is especiallv adapted and arranged :tor operating hair clippers although capable of use t'or other purposes. By this arrangement, the motor '7 may be run at high speed "which may be reduced and varied, as desired.A

Thus the shaft 2l may be operated at a coniparatively slouY speed and direct connection made wi -i the clipper driving mechanism; thus tending to eliminate vibration in the clipper and greatly simplifying the parts thereof.

While l have illustrated and described the preferred form of construction for carrying my invention into effect; this capable of variation and modification without departing from. the spirit of the invention. therefore; do not Wish to be limited to the precise details of construct-ion set forth, but desire to avail myself of such variations and modifications as come Within the scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent is: l. Speed varying mechanism comprising a friction disk; a shaft arranged across the face of said disk having one end pivoted at one side of the center of said disc, and forming with the face of said disc a variable angle; and a beveled friction Wheel; adjustably mounted on said shaft contacting With said disk, substantially as described.

2. Speed varying mechanism comprising a friction disk; a shaft arranged across the face of said disk having one end pivoted at one side of the center of said disc7 and forming with the face of said disc a variable angle; a bevelled friction Wheel splined on said shaft contacting Wit-h said disk; and means for adjusting said Wheel on said shaft; substantially as described.

3. Speed varying mechanisun comprising a friction disk; a shaft arranged across the face of said disk having one end pivoted at one side of the cent-er of said disc, and forming with the face of said disc a variable angle; a bevelled friction Wheel adjustably mounted on said shaft contacting with said disk; and means for adjusting the angularity of said shaft, substantially as described.

l. .Speed varying mechanism comprising a friction disl a shaft arranged across the face of said disk having one end pivoted at one sido of the center of said disc, and forming with the face of said disc a variable angle; a bevelled frictionvvheel splined on said shaft contacting with said disk; means for .adjusting said 'Wheel on said shaft, and means for adjusting the angularity of said shaft; substantially as described.

5. Speed varying mechanism comprising a friction disk; a shaft arranged across the face of said disk having one end pivoted'y at one side of the center of said disc, and forming with the face of said disc a kvariable angle; a bearing for one end ofsaid shaft mounted to swing on an axis substantially parallel to the face of said disk; a bearing for the other end of said shaft mounted to slide toward and away from said disk; means for adjusting said slidable bearing; and a. bevelled friction Wheel splined on said shaft and contacting with said disk, substantially as described.

6. Speed verying mechanism comprising a friction disk; a shaft arranged across the face of said disk at an angle thereto; a bearing for one end of said shaft mounted to swing on an axis substantially parallel to the face of said disk; a bearing for the other .end of said shaft mounted to slide toward and awa-y from said disk; means for adjusting said slidable bearing; a bevu elled friction Wheel splined on said shaft and contatcing with said disk; a grooved hub for said friction wheel; a lever carrying a roller running in the groove of said hub and arranged to adjust said friction wheel along said shaft; and an adjusting screw connected Wit-h said lever substantially as described.

T. Speed varying mechanism comprising a friction disk; a shaft arranged across the face of said disk having one end pivoted at one side of the center of said disc, and forming with the face of said disc a variable angle; a bearing for one end of said shaft mounted to swing on an axis substantially parallel to the face of said disk; a bearing for the other end of said shaft mounted to slide toward and away from said disk; means for adjusting said slidable bearing; a bevelled friction Wheel splined on said shaft and contacting with said disk; and a fiexible shaft connected with said first-mentioned shaft adjacent said swinging bearing; subs'tantially as described.

8. Speed varying mechanism comprising a friction disc; a shaft arranged across the face of said disc at an angle thereto; a bevelled friction Wheel splined on said shaft and contacting with said disc; a pivotal bearing for one end of said shaft; guide members mounted adjacent the other end of said shaft; a bearingffor the other end of said shaft slidably mounted in said guide meinbers; and positive means for adjusting the pressure of said friction Wheel against said disc, substantially as described.

In testimony whereof I have signed my naine to this specification in the presence of tivo subscribing witnesses.

VILLIAM E. GRA Y.

Titnesses JOSHUA R. H. Porre, FREDA C. ArrLn'roN. 

